Modding

I need your help again. I decided to figure out some hero perks and specializations. I spent 2 days unsuccessfully searching for the right document. I downloaded the TE mod and new heroes for comparison, and as I understand it, all the changes are implemented using custom scripts. I would like to know if I understood everything correctly, or if there is a file in the Data folder where I can simply change some values. (I couldn't find any files in the game that contained the actual perk values, for example, what the initial leadership gives as a bonus, like +1 to daily growth). Let's say I liked the changes in TE regarding troop gathering and the treasurer skill. Troop Gathering A skill that increases the weekly growth of creatures. For the effect to take place, the hero must be in the city on the last day of the week. Up to level 5, it increases by {3, 2, 1, 0, 0, 0, 0} Up to level 10, it increases by {4, 3, 2, 0, 0, 0, 0}. Up to level 15, it increases by {6, 4, 2, 0, 0, 0, 0} Up to level 20, it increases by {10, 5, 2, 1, 0, 0, 0} Up to level 25, it increases by {12, 8, 3, 2, 1, 0, 0} Up to level 30, it increases by {15, 9, 5, 2, 1, 1, 0} Upon reaching level 30 and above, it increases by {18, 10, 6, 3, 2, 1, 1} Coefficient for Orcs - 0.7, for Dungeon - 0.7, for Necropolis - 0.5 Treasury Management The hero brings 250 gold to the treasury daily + 20 for each hero level.